331331 has 16 divisors (see below), whose sum is σ = 446208. Its totient is φ = 237600.

The previous prime is 331319. The next prime is 331333. The reversal of 331331 is 133133.

It is a de Polignac number, because none of the positive numbers 2^k-331331 is a prime.

It is a super-2 number, since 2×331331² = 219560463122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (331333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 836 + ... + 1166.

It is an arithmetic number, because the mean of its divisors is an integer number (27888).

2³³¹³³¹ is an apocalyptic number.

331331 is a deficient number, since it is larger than the sum of its proper divisors (114877).

331331 is a wasteful number, since it uses less digits than its factorization.

331331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362.

The product of its digits is 81, while the sum is 14.

The square root of 331331 is about 575.6135856632. The cubic root of 331331 is about 69.1970144724.

Adding to 331331 its reverse (133133), we get a palindrome (464464).

The spelling of 331331 in words is "three hundred thirty-one thousand, three hundred thirty-one".